
SLC 8 Point Combination Module
The 1746-IO8 SLC 500 Digital Input/output Combined Module is a combined input and output module by Allen-Bradley and is fitted in any slot (except slot 0) of 1746 I/O chassis. It has four 120V AC inputs per module and 4 relay contacts outputs with 4 points per common. It has an operating voltage range (85-132V AC) similar to most members of the SLC 500 combined I/O modules and has an output rating of 5-65V AC and 5-125V DC at 47-53Hz. It draws a backplane current of 0.03A at 5V DC and 0.025A at 24V DC and has 0.27W heat dissipation on all input points and 0.133W heat across each output points. The module has an aggregate heat dissipation of 3W, and has 35ms and 45ms signal delay time on both the input and output ON and OFF states. The relay contact output has a Normally Open (N.O.) contact with a contact rating of 1.5A continuous current per point at 120V AC and 1.2A per point at 24V DC.
Key Features and Applications

Combination I/O: Provides both input and output capabilities in one module, simplifying system design.
Voltage Compatibility:
Inputs: 85 to 132 VAC, 47 to 63 Hz.
Outputs: 5 to 265 VAC or 5 to 125 VDC, 47 to 63 Hz.
Channel Count: The module offers 8 channels, evenly divided between inputs and outputs.
Points per Common: It includes 4 points per common, providing flexible wiring and configuration options.
Output Type: Features relay normally open contacts.
Lifecycle Status: The module was discontinued on December 31, 2015.
The 1746-IO8 is ideal for various industrial applications, including:
Machine control
Process automation
Material handling
Packaging systems
Technical specifications
| Manufacturer | Rockwell Automation |
| Brand | Allen-Bradley |
| Part Number/Catalog No. | 1746-IO8 |
| Series | SLC 500 |
| Module Type | Digital I/O Combination Module |
| Operating Voltage | 85-132 Volts AC |
| Inputs | 4 |
| Outputs | 4 |
| Signal delay | 35-45 milliseconds |
| Current/Output (24VDC) | 1.2 amps |
| Current/Output (120 VAC) | 1.5 amps |
| Applications | Combination 120 Volts AC I/O |
| UPC | 10662073902697 |
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